Bluetooth headset



FIG. 1 is a right, front side perspective view of a bluetooth headset showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a front view thereof, the rear is plain and unornamented.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a bluetooth headset, as shown and described. 